6 LE CONTE.— LONGICORN COLEOPTERA 



obliged to seek for an assemblage of characters to define our groups, instead of basing 

 them on isolated peculiarities. This method I have endeavoured to pursue, and as 

 far as the limited materials existing in American collections could give me aid, the 

 genera of this subdivision may be divided into the following groups. 



A. Palpi maxillares maxillis longiores. 

 a. Mandibulffi integrce, mesosternum gibbum. 



f lateribus sinuatis, 



g ! , ., ,. r sterna latissima, arete coniuncta, 



■^i lateribus rectis) ■' 



(_ sterna mediocria, 



W 



I 



a, 

 ea 

 O 



h. Mandibulae bifidse 



c. Mandibulcc integrae, mesosternum planum, 

 'g, Trt baud clavata, acetabula antica rotundata, hientia, 



E 

 o 



S 



s 



u 



Oh 



' baud dilatati, acetabula, vel rotundata, vel angustata, 



^ 1 



3 



i3 1 



'•Ti 



1-2 I 



rotundata 



postice hientia, 



{postice 

 integra, 



"§ [^ extus angulata, 



"£ 

 o 



"^ ("Acetabula antica angulata, 



ante oculos sitre, (^Acetabula antica rotundata (mandibula scalprarite,) 

 quadrata, perpendicularis, ........ 



rostratum, ............ 



B. Palpi maxillares brevissimi, . . . . , 



I. 



IT. 



III. 



IV. 

 X. 

 V. 



VI. 

 VII. 



TX. 



XI. 



XII. 



VIII. 



XIII. 



XIV. 



I now proceed to define these groups, giving at the same time a list of the genera 

 vi^hich each contains. In many cases, owing to the indefinite nature of Serville's 

 tables, there is some doubt where a genus should be placed, in such cases I have 

 added a note of interrogation, to signify that I had no opportunity of examining the 



I. 



Sterna gibba. 



Palpi articulo ultimo parum dilatato. 



Elytra lateribus sinuata. 



Antennae breves. 



Mandibulie acutse. 



Cryptopleura, n. g., from Mexico. 



II. 



Sterna latissima arete conjuncta. 

 Palpi parum dilatati. 

 Elytra lateribus rectis. 

 Mandibulae integrse. 



Megaderus, Lissonotus. 



